// ----------------------------------------------------------------------------
// markItUp! Universal MarkUp Engine, JQuery plugin
// v 1.1.5
// Dual licensed under the MIT and GPL licenses.
// ----------------------------------------------------------------------------
// Copyright (C) 2007-2008 Jay Salvat
// http://markitup.jaysalvat.com/
// ----------------------------------------------------------------------------
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// ----------------------------------------------------------------------------
(function($) {
    $.fn.markItUp = function(settings, extraSettings) {
        var options, ctrlKey, shiftKey, altKey;
        ctrlKey = shiftKey = altKey = false;

        options = { id: '',
            nameSpace: '',
            root: '',
            previewInWindow: '', // 'width=800, height=600, resizable=yes, scrollbars=yes'
            previewAutoRefresh: true,
            previewPosition: 'after',
            previewTemplatePath: '~/templates/preview.html',
            previewCssPath: '',
            previewParserPath: '',
            previewParserVar: 'data',
            resizeHandle: true,
            beforeInsert: '',
            afterInsert: '',
            onEnter: {},
            onShiftEnter: {},
            onCtrlEnter: {},
            onTab: {},
            markupSet: [{ /* set */}]
        };
        $.extend(options, settings, extraSettings);

        // compute markItUp! path
        if (!options.root) {
            $('script').each(function(a, tag) {
                miuScript = $(tag).get(0).src.match(/(.*)jquery\.markitup(\.pack)?\.js$/);
                if (miuScript !== null) {
                    options.root = miuScript[1];
                }
            });
        }

        return this.each(function() {
            var $$, textarea, levels, scrollPosition, caretPosition, caretOffset,
				clicked, hash, header, footer, previewWindow, template, iFrame, abort;
            $$ = $(this);
            textarea = this;
            levels = [];
            abort = false;
            scrollPosition = caretPosition = 0;
            caretOffset = -1;

            options.previewParserPath = localize(options.previewParserPath);
            options.previewTemplatePath = localize(options.previewTemplatePath);
            options.previewCssPath = localize(options.previewCssPath);

            // apply the computed path to ~/
            function localize(data, inText) {
                if (inText) {
                    return data.replace(/("|')~\//g, "$1" + options.root);
                }
                return data.replace(/^~\//, options.root);
            }

            // init and build editor
            function init() {
                id = ''; nameSpace = '';
                if (options.id) {
                    id = 'id="' + options.id + '"';
                } else if ($$.attr("id")) {
                    id = 'id="markItUp' + ($$.attr("id").substr(0, 1).toUpperCase()) + ($$.attr("id").substr(1)) + '"';

                }
                if (options.nameSpace) {
                    nameSpace = 'class="' + options.nameSpace + '"';
                }
                $$.wrap('<div ' + nameSpace + '></div>');
                $$.wrap('<div ' + id + ' class="markItUp"></div>');
                $$.wrap('<div class="markItUpContainer"></div>');
                $$.addClass("markItUpEditor");

                // add the header before the textarea
                header = $('<div class="markItUpHeader"></div>').insertBefore($$);
                $(dropMenus(options.markupSet)).appendTo(header);

                // add the footer after the textarea
                footer = $('<div class="markItUpFooter"></div>').insertAfter($$);

                // add the resize handle after textarea
                if (options.resizeHandle === true && $.browser.safari !== true) {
                    resizeHandle = $('<div class="markItUpResizeHandle"></div>')
						.insertAfter($$)
						.bind("mousedown", function(e) {
						    var h = $$.height(), y = e.clientY, mouseMove, mouseUp;
						    mouseMove = function(e) {
						        $$.css("height", Math.max(20, e.clientY + h - y) + "px");
						        return false;
						    };
						    mouseUp = function(e) {
						        $("html").unbind("mousemove", mouseMove).unbind("mouseup", mouseUp);
						        return false;
						    };
						    $("html").bind("mousemove", mouseMove).bind("mouseup", mouseUp);
						});
                    footer.append(resizeHandle);
                }

                // listen key events
                $$.keydown(keyPressed).keyup(keyPressed);

                // bind an event to catch external calls
                $$.bind("insertion", function(e, settings) {
                    if (settings.target !== false) {
                        get();
                    }
                    if (textarea === $.markItUp.focused) {
                        markup(settings);
                    }
                });

                // remember the last focus
                $$.focus(function() {
                    $.markItUp.focused = this;
                });
            }

            // recursively build header with dropMenus from markupset
            function dropMenus(markupSet) {
                var ul = $('<ul></ul>'), i = 0;
                $('li:hover > ul', ul).css('display', 'block');
                $.each(markupSet, function() {
                    var button = this, t = '', title, li, j;
                    title = (button.key) ? (button.name || '') + ' [Ctrl+' + button.key + ']' : (button.name || '');
                    key = (button.key) ? 'accesskey="' + button.key + '"' : '';
                    if (button.separator) {
                        li = $('<li class="markItUpSeparator">' + (button.separator || '') + '</li>').appendTo(ul);
                    } else {
                        i++;
                        for (j = levels.length - 1; j >= 0; j--) {
                            t += levels[j] + "-";
                        }
                        li = $('<li class="markItUpButton markItUpButton' + t + (i) + ' ' + (button.className || '') + '"><a href="" ' + key + ' title="' + title + '">' + (button.name || '') + '</a></li>')
						.bind("contextmenu", function() { // prevent contextmenu on mac and allow ctrl+click
						    return false;
						}).click(function() {
						    return false;
						}).mouseup(function() {
						    if (button.call) {
						        eval(button.call)();
						    }
						    markup(button);
						    return false;
						}).hover(function() {
						    $('> ul', this).show();
						    $(document).one('click', function() { // close dropmenu if click outside
						        $('ul ul', header).hide();
						    }
								);
						}, function() {
						    $('> ul', this).hide();
						}
						).appendTo(ul);
                        if (button.dropMenu) {
                            levels.push(i);
                            $(li).addClass('markItUpDropMenu').append(dropMenus(button.dropMenu));
                        }
                    }
                });
                levels.pop();
                return ul;
            }

            // markItUp! markups
            function magicMarkups(string) {
                if (string) {
                    string = string.toString();
                    string = string.replace(/\(\!\(([\s\S]*?)\)\!\)/g,
						function(x, a) {
						    var b = a.split('|!|');
						    if (altKey === true) {
						        return (b[1] !== undefined) ? b[1] : b[0];
						    } else {
						        return (b[1] === undefined) ? "" : b[0];
						    }
						}
					);
                    // [![prompt]!], [![prompt:!:value]!]
                    string = string.replace(/\[\!\[([\s\S]*?)\]\!\]/g,
						function(x, a) {
						    var b = a.split(':!:');
						    if (abort === true) {
						        return false;
						    }
						    value = prompt(b[0], (b[1]) ? b[1] : '');
						    if (value === null) {
						        abort = true;
						    }
						    return value;
						}
					);
                    return string;
                }
                return "";
            }

            // prepare action
            function prepare(action) {
                if ($.isFunction(action)) {
                    action = action(hash);
                }
                return magicMarkups(action);
            }

            // build block to insert
            function build(string) {
                openWith = prepare(clicked.openWith);
                placeHolder = prepare(clicked.placeHolder);
                replaceWith = prepare(clicked.replaceWith);
                closeWith = prepare(clicked.closeWith);
                if (replaceWith !== "") {
                    block = openWith + replaceWith + closeWith;
                } else if (selection === '' && placeHolder !== '') {
                    block = openWith + placeHolder + closeWith;
                } else {
                    block = openWith + (string || selection) + closeWith;
                }
                return { block: block,
                    openWith: openWith,
                    replaceWith: replaceWith,
                    placeHolder: placeHolder,
                    closeWith: closeWith
                };
            }

            // define markup to insert
            function markup(button) {
                var len, j, n, i;
                hash = clicked = button;
                get();

                $.extend(hash, { line: "",
                    root: options.root,
                    textarea: textarea,
                    selection: (selection || ''),
                    caretPosition: caretPosition,
                    ctrlKey: ctrlKey,
                    shiftKey: shiftKey,
                    altKey: altKey
                }
							);
                // callbacks before insertion
                prepare(options.beforeInsert);
                prepare(clicked.beforeInsert);
                if (ctrlKey === true && shiftKey === true) {
                    prepare(clicked.beforeMultiInsert);
                }
                $.extend(hash, { line: 1 });

                if (ctrlKey === true && shiftKey === true) {
                    lines = selection.split(/\r?\n/);
                    for (j = 0, n = lines.length, i = 0; i < n; i++) {
                        if ($.trim(lines[i]) !== '') {
                            $.extend(hash, { line: ++j, selection: lines[i] });
                            lines[i] = build(lines[i]).block;
                        } else {
                            lines[i] = "";
                        }
                    }
                    string = { block: lines.join('\n') };
                    start = caretPosition;
                    len = string.block.length + (($.browser.opera) ? n : 0);
                } else if (ctrlKey === true) {
                    string = build(selection);
                    start = caretPosition + string.openWith.length;
                    len = string.block.length - string.openWith.length - string.closeWith.length;
                    len -= fixIeBug(string.block);
                } else if (shiftKey === true) {
                    string = build(selection);
                    start = caretPosition;
                    len = string.block.length;
                    len -= fixIeBug(string.block);
                } else {
                    string = build(selection);
                    start = caretPosition + string.block.length;
                    len = 0;
                    start -= fixIeBug(string.block);
                }
                if ((selection === '' && string.replaceWith === '')) {
                    caretOffset += fixOperaBug(string.block);

                    start = caretPosition + string.openWith.length;
                    len = string.block.length - string.openWith.length - string.closeWith.length;

                    caretOffset = $$.val().substring(caretPosition, $$.val().length).length;
                    caretOffset -= fixOperaBug($$.val().substring(0, caretPosition));
                }
                $.extend(hash, { caretPosition: caretPosition, scrollPosition: scrollPosition });

                if (string.block !== selection && abort === false) {
                    insert(string.block);
                    set(start, len);
                } else {
                    caretOffset = -1;
                }
                get();

                $.extend(hash, { line: '', selection: selection });

                // callbacks after insertion
                if (ctrlKey === true && shiftKey === true) {
                    prepare(clicked.afterMultiInsert);
                }
                prepare(clicked.afterInsert);
                prepare(options.afterInsert);

                // refresh preview if opened
                if (previewWindow && options.previewAutoRefresh) {
                    refreshPreview();
                }

                // reinit keyevent
                shiftKey = altKey = ctrlKey = abort = false;
            }

            // Substract linefeed in Opera
            function fixOperaBug(string) {
                if ($.browser.opera) {
                    return string.length - string.replace(/\n*/g, '').length;
                }
                return 0;
            }
            // Substract linefeed in IE
            function fixIeBug(string) {
                if ($.browser.msie) {
                    return string.length - string.replace(/\r*/g, '').length;
                }
                return 0;
            }

            // add markup
            function insert(block) {
                if (document.selection) {
                    var newSelection = document.selection.createRange();
                    newSelection.text = block;
                } else {
                    $$.val($$.val().substring(0, caretPosition) + block + $$.val().substring(caretPosition + selection.length, $$.val().length));
                }
            }

            // set a selection
            function set(start, len) {
                if (textarea.createTextRange) {
                    // quick fix to make it work on Opera 9.5
                    if ($.browser.opera && $.browser.version >= 9.5 && len == 0) {
                        return false;
                    }
                    range = textarea.createTextRange();
                    range.collapse(true);
                    range.moveStart('character', start);
                    range.moveEnd('character', len);
                    range.select();
                } else if (textarea.setSelectionRange) {
                    textarea.setSelectionRange(start, start + len);
                }
                textarea.scrollTop = scrollPosition;
                textarea.focus();
            }

            // get the selection
            function get() {
                textarea.focus();

                scrollPosition = textarea.scrollTop;
                if (document.selection) {
                    selection = document.selection.createRange().text;
                    if ($.browser.msie) { // ie
                        var range = document.selection.createRange(), rangeCopy = range.duplicate();
                        rangeCopy.moveToElementText(textarea);
                        caretPosition = -1;
                        while (rangeCopy.inRange(range)) { // fix most of the ie bugs with linefeeds...
                            rangeCopy.moveStart('character');
                            caretPosition++;
                        }
                    } else { // opera
                        caretPosition = textarea.selectionStart;
                    }
                } else { // gecko
                    caretPosition = textarea.selectionStart;
                    selection = $$.val().substring(caretPosition, textarea.selectionEnd);
                }
                return selection;
            }

            // open preview window
            function preview() {
                if (!previewWindow || previewWindow.closed) {
                    if (options.previewInWindow) {
                        previewWindow = window.open('', 'preview', options.previewInWindow);
                    } else {
                        iFrame = $('<iframe class="markItUpPreviewFrame" frameborder="0"></iframe>');
                        if (options.previewPosition == 'after') {
                            iFrame.insertAfter(footer);
                        } else {
                            iFrame.insertBefore(header);
                        }
                        previewWindow = iFrame[iFrame.length - 1].contentWindow || frame[iFrame.length - 1];
                    }
                } else if (altKey === true) {
                    if (iFrame) {
                        iFrame.remove();
                    }
                    previewWindow.close();
                    previewWindow = iFrame = false;
                }
                if (!options.previewAutoRefresh) {
                    refreshPreview();
                }
            }

            // refresh Preview window
            function refreshPreview() {
                if (previewWindow.document) {
                    try {
                        sp = previewWindow.document.documentElement.scrollTop
                    } catch (e) {
                        sp = 0;
                    }
                    previewWindow.document.open();
                    previewWindow.document.write(renderPreview());
                    previewWindow.document.close();
                    previewWindow.document.documentElement.scrollTop = sp;
                }
                if (options.previewInWindow) {
                    previewWindow.focus();
                }
            }

            function renderPreview() {
                if (options.previewParserPath !== '') {
                    $.ajax({
                        type: 'POST',
                        async: false,
                        url: options.previewParserPath,
                        data: options.previewParserVar + '=' + encodeURIComponent($$.val()),
                        success: function(data) {
                            phtml = localize(data, 1);
                        }
                    });
                } else {
                    if (!template) {
                        $.ajax({
                            async: false,
                            url: options.previewTemplatePath,
                            success: function(data) {
                                template = localize(data, 1);
                            }
                        });
                    }
                    phtml = template.replace(/<!-- content -->/g, $$.val());
                    if (options.previewCssPath) {
                        phtml = phtml.replace(/<!-- css -->/, "<link href=\"" + options.previewCssPath + "\" rel=\"stylesheet\" type=\"text/css\" />");
                    }
                }
                return phtml;
            }

            // set keys pressed
            function keyPressed(e) {
                shiftKey = e.shiftKey;
                altKey = e.altKey;
                ctrlKey = (!(e.altKey && e.ctrlKey)) ? e.ctrlKey : false;

                if (e.type === 'keydown') {
                    if (ctrlKey === true) {
                        li = $("a[accesskey=" + String.fromCharCode(e.keyCode) + "]", header).parent('li');
                        if (li.length !== 0) {
                            ctrlKey = false;
                            li.triggerHandler('mouseup');
                            return false;
                        }
                    }
                    if (e.keyCode === 13 || e.keyCode === 10) { // Enter key
                        if (ctrlKey === true) {  // Enter + Ctrl
                            ctrlKey = false;
                            markup(options.onCtrlEnter);
                            return options.onCtrlEnter.keepDefault;
                        } else if (shiftKey === true) { // Enter + Shift
                            shiftKey = false;
                            markup(options.onShiftEnter);
                            return options.onShiftEnter.keepDefault;
                        } else { // only Enter
                            markup(options.onEnter);
                            return options.onEnter.keepDefault;
                        }
                    }
                    if (e.keyCode === 9) { // Tab key
                        if (shiftKey == true || ctrlKey == true || altKey == true) { // Thx Dr Floob.
                            return false;
                        }
                        if (caretOffset !== -1) {
                            get();
                            caretOffset = $$.val().length - caretOffset;
                            set(caretOffset, 0);
                            caretOffset = -1;
                            return false;
                        } else {
                            markup(options.onTab);
                            return options.onTab.keepDefault;
                        }
                    }
                }
            }

            init();
        });
    };

    $.fn.markItUpRemove = function() {
        return this.each(function() {
            $$ = $(this).unbind().removeClass('markItUpEditor');
            $$.parent('div').parent('div.markItUp').parent('div').replaceWith($$);
        }
		);
    };

    $.markItUp = function(settings) {
        var options = { target: false };
        $.extend(options, settings);
        if (options.target) {
            return $(options.target).each(function() {
                $(this).focus();
                $(this).trigger('insertion', [options]);
            });
        } else {
            $('textarea').trigger('insertion', [options]);
        }
    };
})(jQuery);
